pour point depressant造句
polymericpourpointdepressantadditivePreparationofacrylate-styrene-maleicanhydrideterpolymeraspourpointdepressantApourpointdepressant(PPD)forimprovingthecoldfluidityofdieseloilswasstudied.Ateststudyoni...
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depressant造句
Anyofvariousdepressantdrugsusedtoreducetensionoranxietyandtotreatpsychoticstates.Thoughalcoholisadepressantthatwillhelpyoufallasleepintheshortterm,onceitseffectswearoff,itcancauseyoutowakeupprematurel...